Air Quality in St. Catharines, Canada

Windy
11.7°C · 81.7% humidity
11.7°
Feels 11.7°
36
Good
Air quality is satisfactory. Enjoy outdoor activities.
Calibrated model

Nearby Monitoring Stations

AQI Forecast
25 1pm
25
25
25 4pm
37
37
37 7pm
37
37
37 10pm
37
37
37 1am
37
37
37 4am
37
37
25 7am
25
37
37 10am
37
37
AD 728×90
81.7%
Humidity
150.0 km/h
Wind SW
1023.9 hPa
Pressure
0.7
UV Low
GoodModerateUSGUnhealthyVery UnhealthyHazardous

What is the weather forecast for St. Catharines?

Temperature & Precipitation

PM2.58.6 µg/m³ ✓ WHO
Good
PM1013.7 µg/m³
Good
UV INDEX0.7
Low
AD 300×250

What is the 7-day forecast for St. Catharines?

04-09
11.7° 2.7°
04-10
12.2° 7.9°
04-11
8.3° 4.9°
7.13 mm
04-12
7.6° 5.0°
0.38 mm
04-13
15.3° 5.2°
5.63 mm
04-14
16.1° 11.9°
2.56 mm
04-15
12.3° 6.8°
18.25 mm
Both models agree Avg diff: 5.2°C

Where are air quality stations near St. Catharines?

41
St. Catharines, Ontario, Canada
1.4 km

What cities are near St. Catharines?

36 Thorold 35 Niagara-on-the-Lake 36 Niagara Falls 36 Niagara Falls 37 Welland 15 Grimsby 12 Grand Island 38 Port Colborne 12 North Tonawanda 12 Kenmore

Data sources: AQI from ground-level monitoring stations via AQICN. Weather forecast from ECMWF (IFS & CAMS models). AQI calculated using US EPA standard. Updated 2026-04-09T16:57 UTC.